My take on the "blister effect" originally from J.K Tillar. It is one I keep with me all the time... From the audience point of view, this effect will look completely improvised as you present it with nothing! Just their fingers and yours. It really blows people's minds (laymen and magicians alike). They don"t see it coming!
- Finger burn: Ask a spectator to show you any finger; and put it over a candlelight or an invisible lighter. Your same finger will carry a blister even though your hands were apparently in full view all the time.
- Voodoo finger: A variation to give away your business card.
- Voodoo Business: Another gimmick and presentation idea.